Gag-Pol of the Athila group elements. (A) The structural organization of the Athila4 and Calypsoconsensus elements are shown along with individual-related elements from pea (Cyclops-2; Chavanne et al. 1998), barley (BAGY-2; Shirasu et al. 2000), rice (accession numberAP003054, 36238–53391 bp; an inserted element was removed for the diagram), and soybean (Diaspora, accession number AF095730). Below Cyclops-2 is a graph depicting amino acid identity along the length of Gag-Pol. Light gray depicts protease (PR), medium gray depicts reverse transcriptase (RT), and dark gray depicts integrase (IN). All other aspects of the figure are as described in the Fig. 2legend. (B ) Amino acid sequence signatures of Gag-Pol. The sequence domains are described in the text. Motifs are shown that define the seven conserved domains of reverse transcriptase (Xiong and Eickbush 1990). For integrase, the zinc-binding domain is shown, as are signatures for the DD35E domain (Fayet et al. 1990) and the GPY/F motif (Malik and Eickbush 1999).
